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From: Loryn Jenkins <loryn@s054.aone.net.au>
Subject: Re: Software landmines (loops)
Date: 1998/09/07
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Date: 1998-09-06T22:05:52+00:00
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Charles Hixson wrote:
> 
> Loryn Jenkins wrote:
> ...
> > This is an interesting approach to DBC: specify your preconditions and
> > write your function to ensure the preconditions are met, else bail.
> >
> > However, I think Meyer's approach to DBC is more powerful than this.
> > Basically, Meyer's approach is to make the calling routine check the
> > preconditions, not the called routine.
> ...
> > Loryn Jenkins
> 
> But frequently the programmer does not have the choice of what language
> is to be used.  E.g., most of my work for the last couple of years has
> been in various flavors of Visual Basic.  (At least it's lots better
> than Dartmouth Basic).

DBC is a methodological principle. You can use this design mechanism in
any language.

DBC simply forms a protocol that holds between various routines in the
software. You are currently using such a protocol (even if you haven't
thought of it in these terms). This is just a different one.

Loryn Jenkins